?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Dang%2C+Duc+Hanh&rft.aulast=Dang&rft.aufirst=Duc+Hanh&rft.date=2008&rft.title=On+Integrating+OCL+and+Triple+Graph+Grammars&rft.genre=proceeding